Used in peptide synthesis as a building block for creating custom peptide sequences, particularly in solid-phase peptide synthesis (SPPS). It serves as a protected form of D-2,4-diaminobutyric acid, where the Fmoc group ensures selective deprotection during the synthesis process. This compound is valuable in research and drug development, especially for designing peptides with specific biological activities or structural properties. Its application is critical in producing peptides for studies in biochemistry, pharmacology, and medicinal chemistry, enabling the exploration of peptide-based therapeutics and biomaterials.